syzkaller login: [ 38.729357] BUG: Bad rss-counter state mm:000000000a1d6324 type:MM_FILEPAGES val:33 [ 38.730668] BUG: Bad rss-counter state mm:000000000a1d6324 type:MM_ANONPAGES val:22 [ 38.900004] ================================================================== [ 38.900922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.901908] Read of size 8 at addr ffff888018d32b38 by task sshd/225 [ 38.902820] [ 38.903065] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.903925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.904917] Call Trace: [ 38.905236] [ 38.905531] dump_stack_lvl+0x91/0xf0 [ 38.906030] print_report+0xcc/0x620 [ 38.906541] ? __virt_addr_valid+0x102/0x340 [ 38.907134] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907782] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.908423] kasan_report+0xbe/0xf0 [ 38.908919] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909591] vma_interval_tree_remove+0xc75/0xec0 [ 38.910214] vma_prepare+0xc54/0x11a0 [ 38.910708] __split_vma+0x5af/0x950 [ 38.911194] ? __pfx___split_vma+0x10/0x10 [ 38.911741] ? find_held_lock+0x2c/0x110 [ 38.912301] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.912924] ? lock_is_held_type+0x9f/0x120 [ 38.913497] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.914139] ? mtree_range_walk+0x632/0x900 [ 38.914714] ? mas_walk+0x5c7/0x7c0 [ 38.915213] do_vmi_munmap+0x1f1/0x2b0 [ 38.915722] mmap_region+0x1f9/0x2660 [ 38.916223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.916762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.917529] ? __pfx_lock_acquire+0x10/0x10 [ 38.918084] ? __pfx_mmap_region+0x10/0x10 [ 38.918631] ? security_mmap_addr+0x7d/0xa0 [ 38.919191] ? get_unmapped_area+0x1f5/0x3f0 [ 38.919760] do_mmap+0x854/0xf00 [ 38.920211] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.920720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.921308] ksys_mmap_pgoff+0x3af/0x500 [ 38.921858] do_syscall_64+0x3f/0x90 [ 38.922373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923066] RIP: 0033:0x7f57578f3d82 [ 38.923541] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.925788] RSP: 002b:00007ffd54abe208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.926768] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57578f3d82 [ 38.927652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5756d2d000 [ 38.928535] RBP: 00007f5756d2d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.929420] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d987aeec0 [ 38.930332] R13: 00007ffd54abe220 R14: 00007ffd54abe250 R15: 00007ffd54abe5b0 [ 38.931231] [ 38.931557] [ 38.931790] Allocated by task 218: [ 38.932247] kasan_save_stack+0x22/0x50 [ 38.932770] kasan_set_track+0x25/0x30 [ 38.933280] __kasan_slab_alloc+0x59/0x70 [ 38.933839] kmem_cache_alloc+0x16b/0x370 [ 38.934375] vm_area_dup+0x20/0x160 [ 38.934841] __split_vma+0x170/0x950 [ 38.935319] split_vma+0xc6/0x110 [ 38.935778] mprotect_fixup+0x8d2/0xb30 [ 38.936333] do_mprotect_pkey+0x87e/0xd40 [ 38.936873] __x64_sys_mprotect+0x78/0xc0 [ 38.937416] do_syscall_64+0x3f/0x90 [ 38.937932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938601] [ 38.938823] Freed by task 218: [ 38.939230] kasan_save_stack+0x22/0x50 [ 38.939752] kasan_set_track+0x25/0x30 [ 38.940263] kasan_save_free_info+0x2b/0x50 [ 38.940818] __kasan_slab_free+0x10a/0x190 [ 38.941413] kmem_cache_free+0x10d/0x4d0 [ 38.941963] rcu_core+0x8c8/0x2860 [ 38.942431] __do_softirq+0x1b7/0x7d4 [ 38.942932] [ 38.943157] Last potentially related work creation: [ 38.943769] kasan_save_stack+0x22/0x50 [ 38.944292] __kasan_record_aux_stack+0x8e/0xa0 [ 38.944886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.945565] remove_vma+0x139/0x170 [ 38.946053] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.946659] do_vmi_munmap+0x1f1/0x2b0 [ 38.947168] __vm_munmap+0x138/0x3a0 [ 38.947659] __x64_sys_munmap+0x59/0x80 [ 38.948172] do_syscall_64+0x3f/0x90 [ 38.948671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949342] [ 38.949576] The buggy address belongs to the object at ffff888018d32ae0 [ 38.949576] which belongs to the cache vm_area_struct of size 168 [ 38.951085] The buggy address is located 88 bytes inside of [ 38.951085] freed 168-byte region [ffff888018d32ae0, ffff888018d32b88) [ 38.952508] [ 38.952722] The buggy address belongs to the physical page: [ 38.953429] page:00000000569529d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d32 [ 38.954609] memcg:ffff888009638901 [ 38.955047] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955733] page_type: 0xffffffff() [ 38.956205] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.957161] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009638901 [ 38.958099] page dumped because: kasan: bad access detected [ 38.958772] [ 38.958991] Memory state around the buggy address: [ 38.959578] ffff888018d32a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.960436] ffff888018d32a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.961291] >ffff888018d32b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.962163] ^ [ 38.962771] ffff888018d32b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.963633] ffff888018d32c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.964508] ================================================================== [ 38.965732] Disabling lock debugging due to kernel taint [ 41.540936] BUG: Bad rss-counter state mm:00000000b6af841d type:MM_FILEPAGES val:33 [ 41.542037] BUG: Bad rss-counter state mm:00000000b6af841d type:MM_ANONPAGES val:22 [ 42.006869] BUG: Bad rss-counter state mm:00000000ca343917 type:MM_FILEPAGES val:33 [ 42.008553] BUG: Bad rss-counter state mm:00000000ca343917 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12250' (ECDSA) to the list of known hosts. 2023/06/20 21:13:41 fuzzer started 2023/06/20 21:13:41 dialing manager at localhost:36067 2023/06/20 21:13:41 checking machine... 2023/06/20 21:13:41 checking revisions... [ 42.786916] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:13:41 testing simple program... [ 42.838884] cgroup: Unknown subsys name 'net' [ 42.876493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:13:41 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff88801cc37558 RCX=ffffffff860d8201 RDX=0000000000000000 RSI=ffffffff81846194 RDI=ffff88801cc37564 RBP=0000000000000000 RSP=ffff88801cc37470 R8 =ffffffff860d825a R9 =ffff88801cc374d0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801cc37558 R13=0000000000000000 R14=ffff88801592b680 R15=ffff88800db305f0 RIP=ffffffff813ad567 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa26628e900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa266845618 CR3=000000000d8b6000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f5fe46d0800 CR3=000000000c802000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=bc2edc9a8017919d214205548d7f5cb5 XMM02=2c67c8bc2e329bc3000000000011be60 XMM03=fb795ef6d65770560000000000122088 XMM04=f90f0b272103aa4700000000000ae988 XMM05=6860aeb314f8829d00000000001325a8 XMM06=f8ea9415651e4fc10000000000130e58 XMM07=e042d86d42eb936e0000000000122360 XMM08=8a42419bbf308917000000000011bec0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000